Author(s): J. Markovic; R. Prenner; H. Drobir
Linked Author(s):
Keywords: Downpull; Leaf gate; Tunnel type high-head gate; Hydraulic model
Abstract: High head gates are required to resist and operate under high head conditions. Due to the value of the hydraulic vertical load the design of the gate is a matter of special concern. Those special forces occur during operation of gates and could be reduced applying some experience achieved from hydraulic model investigations. Research was carried out at the Laboratory of the Institute of Hydraulic Engineering Vienna (IHE). Appropriately scaled model experiments were effectively used to evaluate the hydrodynamic performance of a gate system. Different construction characteristics, like upstream surface, gate slots depth, position of the gate in a gate well and variation of the bottom beam construction, were changed. The vertical downpull force varies with the gate leaf position or gate opening, and its magnitude depends on many factors. Different tunnel type gate shapes (bottom girders) were developed with respect to the reduction of downpull forces.
Year: 2003